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Effects of treatment on exercise tolerance, cardiac function, and mortality in heart failure with preserved ejection fraction

Citation

Holland, DJ and Kumbhani, DJ and Ahmed, SH and Marwick, TH, Effects of treatment on exercise tolerance, cardiac function, and mortality in heart failure with preserved ejection fraction, Journal of the American College of Cardiology, 57, (16) pp. 1676-1686. ISSN 0735-1097 (2011) [Refereed Article]

Copyright Statement

Copyright 2011 American College of Cardiology Foundation

DOI: doi:10.1016/j.jacc.2010.10.057

Abstract

Objectives We sought to determine whether pharmacologic interventions changed exercise capacity, diastolic function, and mortality in a meta-analysis of trials in heart failure with preserved ejection fraction.
Background Treatment strategies for heart failure with preserved ejection fraction remain unproven despite several large-scale trials.
Methods Trials were included in the systematic review where clear comparisons between trial drug and diuretic or placebo were available. Exercise tolerance was assessed by treadmill time, and changes in diastolic function were quantified by transmitral flow (E/A ratio). The primary outcome was all-cause mortality. Weighted mean differences (MDs) and relative risks (RRs), along with their corresponding 95% confidence intervals (CIs), were computed using random-effects models for continuous and dichotomous variables, respectively. The impact of potential covariates was assessed by meta-regression.
Results Data from 53,878 patients enrolled in 30 published reports were collated, including 18 randomized controlled trials (n = 11,253) and 12 observational studies (n = 42,625). In the randomized controlled trials, exercise tolerance was improved by combined therapy (n = 183; weighted MD = 51.5; 95% CI: 27.3 to 75.7; p < 0.001), whereas E/A ratio was not (n = 472; weighted MD = −0.01, 95% CI: −0.02 to 0.02; p = 0.54) even after accounting for baseline E/A (p = 0.87). Over a mean follow-up of 18.6 months, all-cause mortality was not improved by therapy in randomized controlled trials (RR: 0.99, 95% CI: 0.92 to 1.06; p = 0.70), despite accounting for baseline ejection fraction (p = 0.72). In observational reports, there was a reduction in all-cause mortality with therapy in the unadjusted analyses (RR: 0.80, 95% CI: 0.66 to 0.97; p = 0.27), but not after adjustment for clinical and demographic data (RR: 0.93, 95% CI: 0.84 to 1.02; p = 0.10).
Conclusions Pharmacotherapy of heart failure with preserved ejection fraction demonstrates a quantifiable improvement in exercise tolerance but not mortality.

Item Details

Item Type:Refereed Article
Keywords:diastolic, heart failure, preserved, therapy, treatment
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Marwick, TH (Professor Tom Marwick)
ID Code:90937
Year Published:2011
Web of Science® Times Cited:71
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-05-02
Last Modified:2014-06-06
Downloads:0

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